mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-04 13:06:38 +00:00
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2005-2010, Swedish Institute of Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* @(#)$Id: light-sensor.c,v 1.4 2010/02/02 20:59:45 joxe Exp $
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <io.h>
|
|
|
|
#include "contiki.h"
|
|
#include "lib/sensors.h"
|
|
#include "sky-sensors.h"
|
|
#include "dev/light-sensor.h"
|
|
|
|
const struct sensors_sensor light_sensor;
|
|
|
|
/*
|
|
* Initialize periodic readings from the 2 photo diodes. The most
|
|
* recent readings will be stored in ADC internal registers/memory.
|
|
*/
|
|
static void
|
|
light_sensor_init(void)
|
|
{
|
|
ADC12MCTL0 = (INCH_4 + SREF_0); // photodiode 1 (P64)
|
|
ADC12MCTL1 = (INCH_5 + SREF_0); // photodiode 2 (P65)
|
|
|
|
sky_sensors_activate(0x30);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
|
|
switch(type) {
|
|
/* Photosynthetically Active Radiation. */
|
|
case LIGHT_SENSOR_PHOTOSYNTHETIC:
|
|
return ADC12MEM0;
|
|
|
|
/* Total Solar Radiation. */
|
|
case LIGHT_SENSOR_TOTAL_SOLAR:
|
|
return ADC12MEM1;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
case SENSORS_READY:
|
|
return (ADC12CTL0 & (ADC12ON + REFON)) == (ADC12ON + REFON);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
configure(int type, int c)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
if(c) {
|
|
if(!status(SENSORS_ACTIVE)) {
|
|
light_sensor_init();
|
|
}
|
|
} else {
|
|
sky_sensors_deactivate(0x30);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(light_sensor, "Light",
|
|
value, configure, status);
|